“UFC 137: St-Pierre vs. Diaz” Official Event Poster

Although Nick Diaz vacated his Strikeforce welterweight title to swim in Georges St-Pierre’s Octagon pond, it appears their UFC 137 showdown is being promoted as a ‘Champion vs. Champion’ matchup – per the card’s official event poster.

If that’s the case, the 170-pound TITLE UNIFICATION bout takes place October 29th inside the Mandalay Bay Events Center in Las Vegas, Nevada. GSP defends his crown against Diaz in the night’s featured attraction.

A critical shootout between BJ Penn and Carlos Condit will co-headline the pay-per-view broadcast, but that’s not depicted in the billboard.